Is it better to use the Lock Transparency option or do an Alpha to Selection on each layer? In the past it seems that locking the transparency works better, but maybe y'all have other experiences.
There is a distinct difference in what happens between these two approaches. Though both end up with the same amount of alpha in the result, Alpha to Selection will blend the new color with the old color based upon the degree of selection, while Lock Transparency will be an unadulterated new-color-only result.
Imagine a fuzzy white circle on an otherwise transparent layer: performing an Alpha To Selection, and bucket filling with black will result in various shades of gray along the edges; whereas Lock Transparency would result in a pure black result.
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